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JQ'LIVVESEY', J. EDWARDS, & w. JEFFREYS.

.APPARATI'U'S FOR LOCKING RAILWAY-SWITCHES.

No. 194,694. Patented Aug. 28,1877.

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s I v i rfiw MW MZ A 13% Z 7 jam Y HER. WASHiNGTON D C specification ofthe same, wherein we have set UNIT 'STA s .inMEs LivEsn Y, onWESTMINSTER CRESCENT, SOUTH HACKNEY f nonnynssienons o JQBN I CANTEB BD, B RN. M

Specification forming Be it known that ,we, JLIVESEY, of 9 VictoriaChambers, "Westminster, JOHN ED- WABDS, of Oassland Orescent,SonthHackney, and WILLIAM J EFFREYs,of 58 Mawbey Road, all of the county ofMiddlesex, England,have invented an Improved Apparatus for LookingRailway-Switches; and do hereby declare that the following description,taken in connection with the accompanying drawings, hereinafter referredto, forms a full and exact forth the nature and principles of our saidimprovement, by which our invention may be distinguished from others ofa similar class, together with such parts as we claim and desire tosecure by Letters Patent-that is to say:

This invention relates to means of automatically locking the switches orjunctions of one line of rails with another, so that while a train iscoming up to and passing over the switches they cannot be altered. Thislocking is effected by means of a long bar mounted by the side of thetrack at or near a junction or set of switches, the said bar beingconnected with the switches, and so arranged that while any wheel of atrain "is passing along the bar it cannot be moved, andthe bar being ofgreater length than the interval between any two wheels of the train,the switches to which thebar is connected are thus retained firmly inposition until the last wheel of the train has passed the bar. p

The accompanying sheet of drawings shows two ways of mounting the bar soas to operate as described above.

Figurel represents a side view, and Fig. 2 a plan, of one of the railsin advance of a set of switches, with the locking-bar applied thereto;and Fig. 3 is a transverse section through the rail and bar, showing awheel of the train in the act of passing along the bar.

The bar A is mounted on radius-arms B by the side of the rail, so thatit is free to be moved longitudinally through a certain stroke in eitherdirection, but in so moving every SAXE part of Letters Patent No.1:54.694, dated August 28,1877" June 2 51877.

tween them sloping both ways.

7 JOHN EDWARDS, OF onssLAnn ,ANDZ WILLIAM JEFFREYSV, on 58 MAWBEYl Y.AND] Jonnflsrmson FARMER, 0F DLESEX COUNTY, ENGLAND. i

rcular are.

l l poin t in the. bar hastfo describe a ci At either end-of the strokethe ;upper edge of 1 the bar isle-vel with the running surface of I therail, but in moving from the one extreme of its stroke to the other, thebar must necessarily rise above that level, and as it cannot so risewhile any wheel of the train is passing over it, as shown in Fig. 3, itfollows that during the passage of a train the bar cannot be movedlongitudinally in either direction.

From the bar A a rod, D, extends, and is jointed to the one arm of abell-crank, E, the

other arm of which is jointed to the rod 0, which is affixed to andmoves the shiftingrails G of the switch.

Owing to this connection, whenever these shifting-rails are moved eitherway the bar A is caused to make a stroke longitudinally, either from ortoward the switch, and if the bar be prevented from making this stroke,as it is by one or more wheels of the train passing over it, then theswitch-rails connected to the bar are prevented from moving.

Fig. 4 is a side view; Fig. 5, a plan, and Fig. 6 a transverse sectionof the rail and bar arranged in a modified form fora like purpose.

In this case the bar A is mounted on a horizontal pin near one end at L,and near its other end at K thereare formed on .its lower edge twonotches with a projecting part be- A rod, 0, connected to the movingswitch-rails G, is jointed to theme end of a bell-crank lever, H, theother arm of which projects into one or other of the notches K in thebar.

Whenever the switch-rails G are shifted the end of the leverH has tomake a stroke from the one of the notches K to the other, and in passingunder the intermediate projecting part raises the bar A, which works onL as a fulcrum. While the arm of H is engaged in either of the notchesK, the upper edge of the bar A is sufficiently low to clear the flangesof the passing wheels, but cannot be raised while a wheel is over it. Asthe switch-rails cannot be shifted without making the arm of H pass fromthe one notch to the other and PATENT? QFFICE,

thereby raising the bar A, it follows that they cannot be shifted whileany wheel is passing along the bar.

Having thus described the nature of our invention, and two modes inwhich a bar can be practically applied at a 'setof switches so as tocause 'a'train to lock the*switches and to keepthem locked'while it isapproaching toand passing over'th'em, yve wo'uldremark that the mode ofmounting'such a bar and "of connecting it to the switch-rails maybevaried so long as the bar is of greater length than the interval be;tween any two 'successive wheels of the train, and is so mounted thatpassing wheels or their flanges ofl'er animped-iment to the motion ofthe bar, and thereby prevent the possibility of moving theswitches tillall the wheels of. a train have passed-the bar.

We claim as our invention- In combination with the switch-rails of a 5railroad-track,=a nd the mechanism for shifting 4 the same, a barmounted horizontally alenga locked position while said train is passingover the same, whereby all possibility of movlug-said *sw-i-teh-rails isprevented until the train has passed, substantially as set forth.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses, this 8th day of June, 1877.

I JAMES mvnsnv;

JOHN EDWARDS.

WILLIAM JEFFBEYS.

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